Indigoid dyestuffs



- Patented Apr. 23, 1929. i

UNITED-STATES PATENT OFFICE. i

J'OSEF HALLER, OF WIESDORF, NEAR COLOGNE-ON-THE-RHINE, GERMANY, ASSIGNOR TO GRASSELLI DYES'IUFF CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

INDIGOID DYESTUFFS.

No Drawing. Application filed December 9, 1926, Serial No. 153,733, and in Germany January .7. 1926.

The present invention relates to new indigoid dyestuffs of the general formula:

wherein X represents halogen, one Z stands for oxygen and the other Z for an organic residue containing the atom groupmg thisatin (dark red leaflets, melting at 239 C.)

are converted in chlorobenzene solution by means of phosphorous pentachloride into the alpha chloride of the formula -To the so obtained clear solution one adds which have the probable formula:

wherein X represents halogen, to react with a compound containing the atom grouping:

r i 1 4o C and C bcing carbon atoms belonging to an aromatic or hcterocychc nucleus.

The lastgroup includes such compounds as oxythionaphthcne, oxiudol, indoxyl, acenaphthenone, alpha-anthroh"alpha-naphthol, al-

No. 151,608 filed November 29, 1926, and.

parts 4-methyl-6-chloro-3-oxythionaphthene and heats the reaction mass until the formatron of the dyestufi is completed. The precipitated dyestutf is filtered off and washed with alcohol. It is'obtained as a dark violet powder, soluble in concentrated sulfuric acid with a green color. It forms an orange-yellow vat, from which cotton is dyed violet shades of superior fastness to Washing, chlorine and light. The dyestufi' has most probably the formula Ewmple 22.11 parts 6-9-dichloro-1-2- naphthisatin which by crystallization from glacial acetic acid is obtained as dark red neddles, melting at 275-278 0., is dissolved in 2000 parts glacial acetic acid, and 8 parts 2-1-naphthoxythiophcne, dissolved in 50 parts glacial acetic acid are added. After further addition of 3 parts concentrated hydrochloric acid one heats the reaction mass fora short time. The new dyestutf separates, it is filtered off and washed with water. It dissolves in concentrated sulfuric acid with a violet color and dyes cotton from the vat a beautiful deep olive of excellent fastness 2-naphthisatin, obtained by brominating 9- chloro-l-2-naphthisatin and melting at 297 properties.

I t has'most probably the formula:

Example 3. 1 parts 9-chloro-4-bromo-1- The dyestutl can be further halogenated in the usual manner; the dyeings obtained from such halogenated products showimproved fastness properties' I claim:- Y

1. As new roducts the indigoid dyestufi's of the genera formula:

wherein X represents halogen, one Z stands for oxygen and the other-Z foran organic residue containing the atom grouping C and (1 being carbon atoms belonging to an aromatic or heterocyclic nucleus and wherein the aromatic nuclei of the general formula nay be further substituted.

2. As newproducts the indigoid dyestuffs of the general formula;

wherein X represents halogen, C andC carbon atoms belonging to an aromatic or heterocyclic nucleus and wherein the aromatic nuclei of the general'formula may be further substituted.

3. As new products the indigoid dyestuffs of the general formula:

Y 7 wherein Y representshydrogen or halogen and C and C carbon atoms belonging to an aromatic or heterocyclic nucleus.

4. As a new product the indigoid dyestufi of the general formula:

forming a yellow vat from which cotton is dyed greyis'h-blue shades.

In testimony whereof, I aflix my signature.

- JOSEF HALLER. 

